pub enum Entry<'a, K: 'a, V: 'a> {
Occupied(OccupiedEntry<'a, K, V>),
Vacant(VacantEntry<'a, K, V>),
}Expand description
Entry for an existing key-value pair or a vacant location to insert one.
Variants
Occupied(OccupiedEntry<'a, K, V>)
Existing slot with equivalent key.
Vacant(VacantEntry<'a, K, V>)
Vacant slot (no equivalent key in the map).
Implementations
sourceimpl<'a, K, V> Entry<'a, K, V>
impl<'a, K, V> Entry<'a, K, V>
sourcepub fn or_insert_with<F>(self, call: F) -> &'a mut V where
F: FnOnce() -> V,
pub fn or_insert_with<F>(self, call: F) -> &'a mut V where
F: FnOnce() -> V,
Computes in O(1) time (amortized average).
pub fn key(&self) -> &K
sourcepub fn index(&self) -> usize
pub fn index(&self) -> usize
Return the index where the key-value pair exists or will be inserted.
sourcepub fn and_modify<F>(self, f: F) -> Self where
F: FnOnce(&mut V),
pub fn and_modify<F>(self, f: F) -> Self where
F: FnOnce(&mut V),
Modifies the entry if it is occupied.
sourcepub fn or_default(self) -> &'a mut V where
V: Default,
pub fn or_default(self) -> &'a mut V where
V: Default,
Inserts a default-constructed value in the entry if it is vacant and returns a mutable reference to it. Otherwise a mutable reference to an already existent value is returned.
Computes in O(1) time (amortized average).
Trait Implementations
Auto Trait Implementations
impl<'a, K, V> RefUnwindSafe for Entry<'a, K, V> where
K: RefUnwindSafe,
V: RefUnwindSafe,
impl<'a, K, V> Send for Entry<'a, K, V> where
K: Send,
V: Send,
impl<'a, K, V> Sync for Entry<'a, K, V> where
K: Sync,
V: Sync,
impl<'a, K, V> Unpin for Entry<'a, K, V> where
K: Unpin,
impl<'a, K, V> !UnwindSafe for Entry<'a, K, V>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcepub fn borrow_mut(&mut self) -> &mut T
pub fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more